euv-core 0.3.13

use crate::*;

/// Constructs a `VirtualNode::Dynamic` from a render closure with hook context management.
///
/// This function replaces the boilerplate that was previously generated inline
/// by the `html!` macro for every `Dynamic`, `If`, `Match`, and `For` node.
/// The macro now emits `euv_core::create_dynamic_node(render_fn)` instead of
/// the full `HookContext` + `DynamicNode` + `render_fn` setup block.
///
/// # Arguments
///
/// - `FnMut() -> VirtualNode + 'static` - The render closure that produces
///   a virtual node tree. Called on initial render and on every signal update.
///
/// # Returns
///
/// - `VirtualNode` - A `VirtualNode::Dynamic` wrapping the render closure
///   with a fresh `HookContext`.
pub fn create_dynamic_node<F>(mut render_fn: F) -> VirtualNode
where
    F: FnMut() -> VirtualNode + 'static,
{
    let hook_context: HookContext = create_hook_context();
    let mut hook_context_for_closure: HookContext = hook_context;
    let inner: Box<RenderFnInner> = Box::new(RenderFnInner {
        render_fn: Box::new(move || {
            hook_context_for_closure.reset_hook_index();
            render_fn()
        }),
    });
    let render_fn_addr: usize = Box::leak(inner) as *mut RenderFnInner as usize;
    let dynamic_node: DynamicNode = DynamicNode {
        render_fn: render_fn_addr as *mut RenderFnInner,
        hook_context,
    };
    VirtualNode::Dynamic(dynamic_node)
}

/// Constructs a `VirtualNode::Dynamic` for match expressions where arm hook
/// isolation is required. The render closure receives a `&mut HookContext`
/// so it can call `set_arm_changed` before each arm body.
///
/// This function replaces the inline `HookContext` + `DynamicNode` setup that
/// was previously generated for match nodes, where the hook context had to be
/// accessible inside the render closure for arm switching.
///
/// # Arguments
///
/// - `FnMut(&mut HookContext) -> VirtualNode + 'static` - The render closure
///   that receives a mutable reference to the hook context. The closure is
///   responsible for calling `set_arm_changed` before each match arm.
///
/// # Returns
///
/// - `VirtualNode` - A `VirtualNode::Dynamic` wrapping the render closure
///   with a fresh `HookContext`.
pub fn create_dynamic_node_with_context<F>(mut render_fn: F) -> VirtualNode
where
    F: FnMut(&mut HookContext) -> VirtualNode + 'static,
{
    let hook_context: HookContext = create_hook_context();
    let mut hook_context_for_closure: HookContext = hook_context;
    let inner: Box<RenderFnInner> = Box::new(RenderFnInner {
        render_fn: Box::new(move || {
            hook_context_for_closure.reset_hook_index();
            render_fn(&mut hook_context_for_closure)
        }),
    });
    let render_fn_addr: usize = Box::leak(inner) as *mut RenderFnInner as usize;
    let dynamic_node: DynamicNode = DynamicNode {
        render_fn: render_fn_addr as *mut RenderFnInner,
        hook_context,
    };
    VirtualNode::Dynamic(dynamic_node)
}